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(No Model.)

R. POENSGEN.

APPARATUS PoE MAKING SHEET LEAD.

- No. 323,201. Patented July 28, '1885.

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UNITED STATES PATENT OFFICE.

REINHARD POENSGEN, OF DUSSELDORF, PRUSSIA, GERMANY.

APPARATUS FOR MAKING SHEET-LEAD.

SPECIFICATION forming part of Letters Patent No. 323,201, dated July 28, 1885. Application filed October 3, 1F84. y (No model.)I Patented in England July 8, 1884, No. 9,910.

To all whom, t may concern:

Be it known that I, REINHARD PoENsGnN, of the city of Dusseldorf, Prussia, Germany, a subject of the Emperor of Germany, have i`nvented a new and useful manufacture of sheet metal from lead, tin, and other similar metals or alloys thereof, and apparatus for that purpose, of which the following is a specification.

Thin sheet metal or metal foil has heretofore been produced from lead, tin, and alloys by rolling out slabs of metal to the required degree, either hot or cold.

According to the presentinventiomsucli sheet metal or foil is produced by forcing the liquid metal through narrow openingsbetween cheeks or dies, either by means of hydraulic presses or by pressure-pumps or other suitable mechanism.

The advantages of this method of manufacture as compared with that at present employed are mainly as follows: First, the unequal thickness in the sheet metal frequently resulting from the ordinary mode of manufacture is entirely obviated, perfectly uniform thick ness being insured; second, all ,oxide is separated and removed from the purer metal; third, the process of manufacture is cheaper and much more expeditious.

One arrangement of apparatus for carrying out the improved manufacture is shown on the accompanying drawings, in which- Figure l shows a longitudinal section on line c b, Fig. 2. Fig. 2 shows a horizontal section.

' Fig. 8 is a cross-section through the cheeks or dies, drawn to an enlarged scale, and Fig. 4 is a sectional plan of the pressing-box, showing the four parts m, n, p, and q.

In Fig. l, H H2, &c., are hydraulic presses, which may be of any desired number. K K2 K3 K4 are the pistons or plungers thereof, to which is suitably connected the plate or head K, of castor Wrought iron,working accurately against the sides of the rectangular box or chamber P.

B7 BB are two rack-bars which facilitate the movement of cheeks Band B2,end cheeks or dies working in guides, and situated a greater or less distance apart, according to the width of the sheet metal to be produced, the ad- 50. justment of which cheeks, as also that of the side cheeks, to be presently described, is effected by means of the hand-wheels W W2,as

shown at Fig. 2, the motion being transmitted either by toothed gearing, cord-pulleys, or any other suitable mechanism. In Fig. 2 the space Ebetwcen'these cheeks determines the width of vthe sheet of metal- E E are bolts which serve to connect the base with the upper portion of the pressure-box, `and prevent the latter from being forced up with the mass of molten metal and plate K.

The pressing-box is inclosed by one or more castings that are notched out at the points L. Instead of employing cast-iron forthis purpose, T-iron may be employed, suitably arranged and supported by the iron rings It, for strengthening the pressure-box. The rings R are circular, and surround the entire structure. The openings L in the supporting-plates serve to facilitate the Warming or cooling of the box, for the purpose of preserving the uniform temperature of the molten metal. Any suitable known medium may be employed for this purpose.

At Fig. 3 one of the before-described end cheeks, B B2, is shown in section. The side cheeks, B3 B*,Which are adjusted by the screwspindles S S, serve to determine the thickness of the sheet metal to be produced. They are guided in recesses B5 B, formed in the press ing-box, and can be entirely drawn out of the latter by openings at T T.

As indicated at Fig. 2, both t-he end cheeks, B B2, and the side cheeks, B3 B4, are adjusted rapidly and accurately in position by means of the hand-wheels W W2, W being made to adjust B and B2 by toothed racks,as shown, while W2 is caused to rotate all the screw-spindles S simultaneously for the adjustment of B3 and'B4.

For producing the sheet metal, the liquid metal is caused to flow from a neighboring furnace into the box P, which becomes filled up to the top of the projecting rims o o, Fig. 3. Thecheeks are then closed so as to separate the upper part'of the metal which may contain oxides and other impurities specically lighterthan the pure metal, and to inclose the latter within the boX until it has cooled down to a certain degree. The cheeksare then opened out again to the exact distance required for producing a metal sheet of the desired thickness and width, and the hydraulic presses are putin action, so as to force up the ICO plate K, and thus eXtrude the metal in the form of a continuous sheet between the cheeks B B2 B3 B4.

It is obvious that by separating this dross from the purer metal and forcing the latter through the space between the cheeks a more uniformly smooth and superior article is produced. Thus by the employment of my combination of devices a sheet of metal may be formed of any desired thickness, or Aa bar of the metal may be made by simply adjusting the cheeks with relation to each other as will form the bar of the dimensions desired.

l. In apparatus for producing` sheet metal, the combination, with a box or chamber, of the sliding cheeks or dies B B2 and B3 B* and toothed gearing and hand-wheels for effecting their adjustment in determining the width and thickness of the metal, substantially as described.

2. In apparatus for producing sheet metal, the combination of the adjustable cheeks B and B2 with the adjustable cheeks Bi and B4, substantially as deseribed,and for the purpose set forth.

3. In vapparatus for producing sheet metal, the combination of the adjustable cheeks B3 and B", situated near the 'top ofa suitable box, 3o

and constructed substantially as described, whereby they may be closed, thus separating the dross from the pure metal, substantially as described.

4. In the herein-described apparatus for 35 REINHARD POENSGEN.

Vitnesses:

WALTER VIRsNoND, Eursr SPENNEMANN. 

